Pat had some opinions about CAP and SOA and distributed systems, see [0]. I also remember a talk given by Pat and Eric Brewer together, that went deeper into the whole CAP ideas vis-a-vis the model Pat had been advocating (see Fiefdoms and Emissaries [1]), but I can't remember when it was or find a link for it.

[0] https://blogs.msdn.microsoft.com/pathelland/2007/05/20/soa-a...

[1] http://download.microsoft.com/documents/uk/msdn/architecture...